2. Cloud Computing is a technology that uses
the internet and central remote servers to
maintain data and applications. Cloud
computing allows consumers and
businesses to use applications without
installation and access their personal files
at any computer with internet access. This
technology allows for much more efficient
computing by centralizing storage,
memory, processing and bandwidth.
3. • In addition, the platform provides on demand
services, that are always on, anywhere, anytime
and any place.
• Pay for use and as needed, elastic (scale up and
down in capacity and functionalities).
• The hardware and software services are
available to the general public, enterprises,
corporations and businesses markets.
4. What is Driving Cloud Computing
•In one word-economics
•Faster,simpler,cheaper to use clouds apps
•No upfront capital required for servers and
• No ongoing operational expenses for running
• Applications can be accessed from
7. Cloud Computing Service Layers
Services Services – Complete business services such as
PayPal, OpenID, OAuth, Google Maps, Alexa
Application Application – Cloud based software that
Focused Application eliminates the need for local installation such as
Google Apps, Microsoft Online
Development – Software development platforms
Development used to build custom cloud based applications
(PAAS & SAAS) such as SalesForce
Platform – Cloud based platforms, typically
Platform provided using virtualization, such as Amazon
ECC, Sun Grid
Storage Storage – Data storage or cloud based NAS such
Focused as CTERA, iDisk, CloudNAS
Hosting Hosting – Physical data centers such as those run
by IBM, HP, NaviSite, etc.
9. Software as a Service (SaaS)
• SaaS is a model of software deployment where an
application is hosted as a service provided to customers
across the Internet.
• SaaS is generally used to refer to business software rather
than consumer software, falls under Web 2.0!
• By removing the need to install and run an application on a
user’s own computer it is seen as a way for businesses to get
the same benefits as commercial software with smaller cost
• Saas alleviates the burden of software
maintenance/support, but users relinquish control over
software versions and requirements.
• Terms that are used in this sphere include Platform as a
Service (PaaS) and Infrastructure as a Service (IaaS).
10. Infrastructure-as-a-Service (IaaS)
•physical machines, storage, and clusters. virtual machines or
IaaS is service model which consists of
• Cloud infrastructures can also be heterogeneous, integrating
clusters, PCs and workstations.
• The system infrastructure can also include database management
systems and other storage services.
• The infrastructure in general is managed by an upper
management layer that guarantees runtime environment
customization, application isolation, accounting and quality of
•The virtualization tools, such as hypervisors, also sit in this layer
to manage the resource pool and to partition physical
infrastructure in the form of customized virtual machines
11. Platform as a Service (PaaS)
•IaaS gives access to physical resources with some software
configuration, for designing new applications user requires
advanced tools such as Map Reduce etc. These services
constitute another layer called Platform as a Service
(PaaS), offering Cloud users a development platform to
build their applications.
•PaaS offers only the user level middleware, which allows
development and deployment of applications on any Cloud
•PaaS includes the lower layer (IaaS) as well that is bundled
with the offered service.
13. Different Cloud Computing Layers
Application MS Live/Exchange Labs, IBM,
Service Google Apps; Salesforce.com
(SaaS) Quicken Online, Zoho, Cisco
Google App Engine, Mosso,
Application Force.com, Engine Yard,
Platform Facebook, Heroku, AWS
Server 3Tera, EC2, SliceHost,
GoGrid, RightScale, Linode
Storage Amazon S3, Dell, Apple, ...
14. Deployment Model of Cloud
Model are three types
15. Public Model
•Public Cloud is the most common deployment model where
services are available to anyone on Internet.
• To support thousand of public domain users, datacenters built
by public Cloud providers are quite large comprising of
thousands of servers with high speed network.
• A public Cloud can offer any of the three kinds of services: IaaS,
PaaS, and SaaS.
• Amazon EC2 is a public Cloud providing infrastructure as a
•Google AppEngine is a public Cloud providing an application
development platform as a service.
Salesforce.com is public Cloud providing software as a service.
16. Private Cloud
•private Clouds are deployed within the premise of an
organization to provide IT services to its internal users.
•The private Cloud services offer greater control over the
infrastructure, improving security and service resilience
because its access is restricted to one or few organizations.
•Private deployment poses an inherent limitation to end user
•An organization can buy more machines according to
expanding needs of its users, but this cannot be done as fast and
seamlessly as with public Clouds.
17. Hybrid Cloud
•Hybrid Clouds is the deployment which emerged due to
diffusion of both public and private Clouds’s advantages.
•Organizations outsource non-critical information and
processing to the public Cloud, keepscritical services and
data in their control.
• Organizations utilize their existing IT infrastructure for
maintaining sensitive information within the premises,
and whenever require auto-scaling their resources using
•The hybrid Cloud, in general, applies to services related to
IT infrastructure rather than software services.
• Virtual workspaces:
• An abstraction of an execution environment that can be
made dynamically available to authorised clients by using
• Resource quota (e.g. CPU, memory share),
• Software configuration (e.g. O/S, provided services).
• Implement on Virtual Machines (VMs):
• Abstraction of a physical host machine,
• Hypervisor intercepts and emulates instructions from VMs,
and allows management of VMs,
• VMWare, Xen, etc. App App App
OS OS OS
• Provide infrastructure API:
• Plug-ins to hardware/support structures
21. Cloud Storage
• Several large Web companies (such as Amazon and
Google) are now exploiting the fact that they have
data storage capacity that can be hired out to others.
• This approach, known as cloud storage allows data
stored remotely to be temporarily cached on desktop
computers, mobile phones or other Internet-linked
• Amazon’s Elastic Compute Cloud (EC2) and Simple
Storage Solution (S3) are well known examples.
19th May, 09 firstname.lastname@example.org
23. Common Features of Cloud Providers
IDE, SDK, Plugins
Simple Table Store Drives Accessible
storage <key, value> through
Management Console and Monitoring tools
& multi-level security
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24. Windows Azure
• Enterprise-level on-demand capacity
• Fabric of cycles and storage available on-
request for a cost
• You have to use Azure API to work with the
infrastructure offered by Microsoft
• Significant features: web role, worker role ,
blob storage, table and drive-storage
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25. Amazon EC2
• Amazon EC2 is one large complex web service.
• EC2 provided an API for instantiating computing
instances with any of the operating systems
• It can facilitate computations through Amazon
Machine Images (AMIs) for various other models.
• Signature features: S3, Cloud Management Console,
MapReduce Cloud, Amazon Machine Image (AMI)
• Excellent distribution, load balancing, cloud
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26. Google App Engine
• This is more a web interface for a development
environment that offers a one stop facility for
design, development and deployment Java and
Python-based applications in Java, Go and Python.
• Google offers the same reliability, availability and
scalability at par with Google’s own applications
• Interface is software programming based
• Comprehensive programming platform irrespective
of the size (small or large)
• Signature features: templates and appspot, excellent
monitoring and management console
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27. Cloud computing takes
virtualization to the next step
• You don’t have to own the hardware
• You “rent” it as needed from a cloud
• There are public clouds
• e.g. Amazon EC2, and now many others
(Microsoft, IBM, Sun, and others ...)
• A company can create a private one
• With more control over security, etc.
31. •Cloud Sevice Providers
Amazon Elastic Compute Cloud
Amazon Simple Storage Service
Amazon (Amazon S3)
Web Services Amazon Simple Queue Service
Amazon Elastic MapReduce
Amazon Relational Database Service
AWS Premium Support
Citrix Systems Citrix Cloud Center (C3) virtualization
and networking products
32. Dynamic infrastructure.
Service management for
IBM software in a cloud
environment using Amazon
Windows Azure: operating
system as a service.
Microsoft Microsoft SQL Azure:
Windows Azure relational database in the
Sun Cloud Partner Initiative
Sun Scalable infrastructure
•Cloud computing is the fastest growing part
• Tremendous benefits to customers of
customers of all sizes
• Clouds services are simpler to acquire
• Private clouds offer many benefits for
• Cloud computing infrastructures are next
34. •Cloud computing has improved resource
• Cloud computing, being an emerging
technology also raises significant questions
about its environmental sustainability